Skip to main content

How Does a Diesel Generator Work?


How Does a Diesel Generator Work?

A diesel powered generator is the combination of a diesel engine and an alternator or electric generator to generate electrical energy. Here the alternator is the generator which generates the electric power and engine is used to rotate the electric generator. Diesel generators are mostly used as an emergency power supply.

1. Working Principle
Diesel Generator works in four cycles:

Suction/Intake
Compression
Power
Exhaust
The working principle of a diesel generator is based on the law of Energy conversion i.e. “Energy can neither be created nor be destroyed but be only converted from one form to another form.” Since diesel has chemical energy, during combustion the chemical energy is converted into heat and force. This force is known as mechanical energy which helps in rotating the alternator. The combustion process in a diesel engine is commenced by spontaneous ignition of the fuel when it is injected into a highly compressed charge of air which has reached approx. 750 degrees Celsius.

Suction Stroke
Here the piston moves down from the top dead centre due to which the inlet valve opens, and the air is drawn into the cylinder. After drawing enough air with pressure, the suction valve gets closed at the end of the stroke.

Compression Stroke
During this stroke, the piston moves upwards from the bottom dead centre. The air drawn into the cylinder gets trapped inside the cylinder and compressed because of the upward movement of the piston. In diesel generators, since the compression ratio used is very high, the air is compressed to a very high pressure, up to 40kg/cm squared. The temperature of the air is very high at this pressure which is enough to ignite the fuel.

Power Stroke
The fuel is injected into the hot compressed air and it starts burning and maintains the pressure. When the piston reaches the top dead centre the supply of fuel turns off. The injection of the fuel at the end of compression stroke continues till the cut-off point. Both the inlet and exhaust valve remain closed and the hot gases and compressed air now expand in the cylinder which causes the piston to move down and it finally reaches the bottom dead center.

Exhaust Stroke
During this stroke, the piston again moves upward, and the exhaust valve opens. The inlet and fuel valve are closed. Most of the burnt fuel gases escape due to their own expansion. The remaining gases are pushed out by the upward movement of the piston through the exhaust valve. At the end of this stroke, the exhaust valve closes, and the cycle is completed.



Diesel Generator Parts

The following are the main components of a Diesel Generator:

Engine
Alternator
Fuel System
Governor
Voltage Regulator
Cooling and Exhaust Systems
Lubrication System
Flywheel
Control Panel
标签：

Comments

Post a Comment

Popular posts from this blog

What Is the Difference Between Electric Motor and Electric Generator

An electric motor is an electrical machine that converts electrical energy into mechanical energy. Most electric motors operate through the interaction between the motor's magnetic field and winding currents to generate force. In certain applications, such as in regenerative braking with traction motors, electric motors can be used in reverse as generators to recover energy that might otherwise be lost as heat and friction. An electric generator operates in the reverse direction, converting mechanical energy into electrical energy. Electric generator can be divided into various type, open type, silent type, trailer type, portable type and container type, etc. Electric generator is mainly composed of diesel engine & alternator. Electric generator set is mainly composed of engine, alternator, control module, and common base. Electric generator :- Electric generator is a type of machine which converts mechanical input (energy) into electrical output (...
1 comment
Read more

Baudouan Weichai 1530KW Diesel Generator Set 16M33 Series Engine

Weichai is the earliest enterprise in China to develop and produce generator sets, with a production history of over 60 years. It mainly produces land - based and marine generator sets, including diesel - type and gas - type units. Weichai's M33 series engines include 6M33, 12M33, and 16M33 diesel engines. These are high - power high - speed diesel engines independently developed by Weichai based on the mature product platform of Baudouin's M26 series in France. The development of this series of models fills the gap in Weichai's high - speed diesel engines for power generation in the 500 - 1530kW power range, enabling effective competition with foreign brands. The M33 series Weichai engines inherit and carry forward the advanced product development and design concepts of the French Baudouin M26. They are benchmarked against international advanced engines, effectively avoiding various design defects. The product development emphasizes high reliability and low emissions. Th...
Post a Comment
Read more

How to Connect A Diesel Generator to Your House?

Diesel generators are fuel-efficient and reliable, which can almost meet the power needs of any application. If you want to power the whole house during power shortages, it’s a good choice to choose a diesel generator set as the backup electricity supply. But how to connect a diesel generator to your house? Read on and you will find the answer. Options to connect a diesel generator to your home   Keep in mind that never plug your generator directly into the mains, or it will cause back feeding, damage your appliances and be life-threatening for utility workers. Generally, you can choose to connect a generator to your house by using extension cords or a transfer switch. Understanding the difference between them is helpful for you to choose the right type. Extension cords   Typically, extension cords are suitable for smaller diesel generators that used for short term. They require no installation and are cost-effective. If you need to power only some basic appliances such as...
Post a Comment
Read more